Memex
A research second brain for you and your AI.
Memex is a research tool that lets users save websites, highlights, PDFs, videos, notes, ebooks, audiobooks and content from platforms like LinkedIn, Instagram, Reddit, Substack and Kindle. Saved items are transcribed, indexed and searchable by the user and their AI agents. Users can highlight and annotate directly from the browser tab across desktop and mobile, summarize content with sentence/image/timestamped references, and ask questions about saved material. Custom auto-tagging lets users describe criteria and Memex automatically sorts matching items. Users can connect AI agents such as ChatGPT, Codex, Claude, Obsidian, NotebookLM and Notion to search, save and cite their research.
12 alternatives to Memex
Ranked by how well each tool replaces Memex: shared features, audience, price and popularity.
- 55 out of 100 matchContact sales
- 55 out of 100 matchFree
Your own timeline for quick notes, private by default.
Has a free plan and is open source.
Free planOpen source54 out of 100 matchFreeAn intelligent, visual knowledge base built for students, researchers, and lifelong learns
54 out of 100 match$8.99/moAn AI note-taking app for organizing voice and text.
Has a free plan and starts cheaper.
Free plan53 out of 100 match$7/moAn open-source note-taking app with daily notes, backlinks, and local Markdown files.
Has a free plan and is open source.
Free planOpen source53 out of 100 matchContact salesThe Archive (Zettelkasten Method): A personal tool for thinking and writing that creates
52 out of 100 match—Mendeley — The free all-in-one reference manager
Has a free plan and starts cheaper.
Free plan52 out of 100 match$4.99/moAI note-taking app that turns lectures, meetings, PDFs and drafts into structured notes,,
Has a free plan and starts cheaper.
Free plan51 out of 100 match$4.99/mo